简介：ＧｅｏｇｒａｐｈｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｈｙｐｏｃｅｎｔｒａｌｄｅｐｔｈｓｏｆＣｈｉｎｅｓｅｅａｒｔｈｑｕａｋｅｓＸＩＮＧ－ＢＥＩＤＵＡＮ（段星北）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃａｌ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒ...

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简介：WesimulateGPShorizontalvelocityfieldintermsofrotationsofcrustalblockstodescribedeformationbehavioroftheChinesemainlandanditsneighboringareas.31crustalblocksareboundedprimarilyby~30Quaternaryfaultswithdistinctgeometriesandvariablelong-termratesof<20mm/a,and1683GPSvelocitiesweredeterminedfromdecade-longobservationsmostlywithanaverageduncertaintyof1?2mm/a.WedefineGPSvelocityatasitebythecombinationofmotionofrigidblockandelasticstraininducedbythefaultthatislockingduringaseismiccycle.ModelvelocitiespredictedfromthepreferableblockmodelmatchwellwiththeGPSvelocitiestoanuncertaintyof~1.7mm/a.Theslipratesinferredfromthismodelisinarangeof6?18mm/aforthemajorfaultsinTibetanditsmarginsand1?4mm/aineasternChina,consistentwithgeologicalobservations.Ournumericalsimulationsuggeststhatthecrustalblocksdeforminternallyatalevelof~10×10-9/a,quitesmallincomparisonwithsignificantdeformationlocalizedalongfaultzonesof50?100kmwide.Weconcludethatthepatternofcontinentaldeformationisnotcontinuous-likebutblock-like,andthetenetofplatetectonicsmaybeapplicabletocharacterizetheactivedeformationinAsia.

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简介：Basedonthestrongearthquakecatalogue,thispaperdiscussesthecharacteristicsofthetimeseriesofstrongearthquakeactivitiesintheworld,westernChinesemainlandanditsperipheral"bigtriangleseismicregion",aswellastheChinesemainland.AccordingtotheanalysisoftheperiodicfeaturesofglobalseismicityofM≥8.0strongevents,itisfoundthatthereissignificantdifferenceinglobalseismicitybeforeandafterthe1960s.StatisticalanalysiswiththeFishermethodhasrevealedthatthe"bigtriangularseismicregion"hasexperiencedaprocessofM8.0earthquakeactivitywithadurationofoverahundredyearssince1800.Furtheranalysisshowsthattheglobalseismicityandthe"bigtriangularseismicregion"possiblyhasaperiodofahundred-yearscale,andhasquasisynchronicitytoacertainextent.TheshallowearthquakeactivityofMS≥7.0intheChinesemainlandisobviouslycontrolledbytheseismicityinthebigtriangularseismicregionandbyglobalseismicityinalargerspatial-scale.Intermsofthetimeseriesoftheseearthquakes,theseismicityshowsadecadalandcentury-scaleactivitypatterns.

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简介：Addingdampersisacommonlyadoptedseismicriskmitigationstrategyformodernbuildings,andthecorrespondingdesignprocedureofdampershasbeenwellestablishedbytheChineseBuildingCode.Eventhoughalltypesofdampersaredesignedbythesameprocedure,actualseismicperformanceofthebuildingmaydifferfromonetotheothers.Inthisstudy,anine-storybenchmarksteelbuildingisestablished,andthreedifferentandtypicaltypesofdampersaredesignedaccordingtotheChineseBuildingCodetorealizestructuralvibrationcontrolunderstrongearthquakeexcitation.Theseismicresponseoftheprototypebuildingequippedwithaviscoelasticdamper,viscousdamperandbuckling-restrainedbrace(BRB)subjectedto10earthquakerecordsarecalculated,andIncrementalDynamicAnalysis(IDA)isperformedtodescribeprogressivedamageofthestructureunderincreasingearthquakeintensity.Intheperspectiveoffragility,itshowsthattheviscoelasticdamperhasthehighestcollapsemarginratio(CMR),andtheviscousdamperprovidesthebestdriftcontrol.BoththeBRBandviscoelasticdamperscaneffectivelyreducetheflooraccelerationresponsesinthemid-risebuilding.

简介：Usingthedatasetof20±2secand(A/T)maxofsurfacewavesrecordedbyType-763andType-SKseismographsfromfivestationsinBeijingandelsewhere,themeansquaredeviationsuandrelativemeandeviationsDofMsvaluesdeterminedbyfivecalibrationfunctions(a,a763,a300aNandfromMsz(NEIS)arecomparedandanalyzed.Resultsshowthataanda763arerathergoodbetween20°and160°;anda763arerathergoodbetween10and30for20sec;a300isrelativelygoodbetween160and179.

简介：基于可得到、增补的调查data.it在中国大陆的东南的沿海的区域上在台湾和台湾海峡分析seismicity的效果并且在地震危险预防和在台湾区域的强烈地震的频率高的历史的earthquakes.The结果表演的文本的研究讨论它的角色，影响seismicity的紧张，时间intervaI从几到几十年，而是最大值从在那里到C的沿海的区域

简介：Ａｚｉｍｕｔｈａｌ　ａｎｉｓｏｔｒｏｐｙ　ｉｎ　ｌｉｔｈｏｓｐｈｅｒｅ　ｏｎ　ｔｈｅ　Ｃｈｉｎｅｓｅ　ｍａｉｎｌａｎｄ　ｆｒｏｍ　ｏｂｓｅｒｖａｔｉｏｎｓ　ｏｆ　ＳＫＳ　ａｔ　ＣＤＳＮ（郑斯华）（高原）Ａｚｉｍｕｔｈａｌａｎｉｓｏｔｒｏｐｙｉｎｌｉｔ...

简介：TherelateddataofGPSnetworksintheChinesemainlandanditsperipheralareasarecollectedfrominternetsitesinthepaper.AndvariousdatafusionmethodsarepresentedbasedonthecollectedGPSdata.ThustheunifiedhorizontalcrustalvelocityfieldscanbeestablishedintheChinesemainlandanditsperipheralareas.Theavailabledataof423GPSsitesareappliedtothevelocityfieldsanditsareagetsto1.2′107km2.Byanalyzingthevelocityfields,thebasicspatialdistributionfeatureofthehorizontalcrustalmotionintheChinesemainlandanditsperipheralareacanbeobtainedpreliminarily.Meanwhile,therangeofthevelocityfieldsintheChinesemainlandaffectedbythecollisionforceofIndiaplatetoEurasiaplateandtheproblemofprincipaldirectionoftheforcefromIndiaplatearediscussed.

简介：Waveletsareausefultoolforanalyzingthetime-frequencyofanon-stableseriesandarewidelyappliedinmanyfields.Theprocessofearthquakepreparationandoccurrenceisanon-linearprocess.Inthepaper,thewaveletmethodisusedtoanalyzetheseriesofearthquakedataforthetimeperiodfrom1900to2003inthewestoftheChinesemainlandanditsadjacentarea(WCMAA),andtoobtainthecharacteristicinformationfordifferenttimescales.Inthepast103years,therewerefourprimaryperiodsofregionalearthquakeactivityintheareawithdurationsof42,22,7and14years,respectivelyandtheintensityofearthquakeactivitychangingwithtime.Itdoesn'tmakesensetotalkaboutactiveorquietperiodsofearthquakeactivityunlessitisbasedonaspecifictimescale.Inaddition,thetendencyanalysisofearthquakeactivityusingtheprimaryperiodofseismicactivityandwaveletcoefficientsofvariedtimescalesindicatesthattheearthquakeactivityinthisregionwillbehighintheforthcomingyears.

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简介：Inthispaper,weusethedailyrangesoftheverticalmagneticintensityofapproximately76geomagneticstationsfromJanuary1,2008toDecember31,2010toanalyzethespatialandtemporalcharacteristicsofZranges.Theresultsaresummarizedasfollows:(1)Temporally,weuseregressiveanalysisandFFTanalysistoanalyzethedata.TheresultsshowthattheZcomponentdailyrangesofallstationshaveanobviouscyclicalvariation,thecomputedFourierspectraofalldatasetshaveclearlyresolvedtherequiredperiodicitiesinthedata,intheformofdistinctpeaksatdays365,183,22,and73,andthepowerspectraofday365isthehighestinallperiods.(2)Intermsofspatialvariation,thedailyrangesshownonlinearvariationwithlatitudeinChina.Theresultsshowtheexistenceofapointofinflexion(maximalvaluepoint)nearbyatabout25°N,thedailyrangesofZrisefrom15°~25°Nandhaveagoodlineardecreasevariationalongwith25°~50°N.(3)ComparedwiththespatialandtemporalvariationsofZdailyrangeswiththeSqcurrentinversion,wefoundthatthespatialandtemporalcharacteristicsofZrangesaredecidedmainlybythespatio-temporalevolutionoftheSqcurrentsystem.(4)IfthelatitudesofthemaximumamplitudesofvariationoftheverticalcomponentinthegeomagneticquietdaysareroughlytakenasthelatitudescorrespondingtothefociofSqoverheadcurrentsystem,wecanseethattheselatitudesoffocibecomehigherinsummer,arelowestinwinterandhighestduringEquinoxes,displayingconspicuousmonthlyanddailyvariations.Fortwosuccessivegeomagneticquietdays,thelatitudesoffocimayvarytendegrees.

简介：Ａｐｒｅｌｉｍｉｎａｒｙｒｅｓｅａｒｃｈｅｓｔａｂｌｉｓｈｉｎｇｔｈｅｐｒｅｓｅｎｔ－ｔｉｍｅｉｎｔｒａｐｌａｔｅｂｌｏｃｋｓｍｏｖｅｍｅｎｔｍｏｄｅｌｏｎｔｈｅＣｈｉｎｅｓｅｍａｉｎｌａｎｄｂａｓｅｄｏｎＧＰＳｄａｔａＳＨＵＯ－ＹＵＺＨＯＵ１）（周...

简介：ＩｎｓｅａｒｃｈｏｆｐｏｔｅｎｔｉａｌａｒｔｈｑｕａｋｅｓｏｕｒｃｅｒｅｇｉｏｎｓｉｎｔｈｅＣｈｉｎｅｓｅｍａｉｎｌａｎｄｉｎｔｈｅｌｉｇｈｔｏｆａｍｂｉｅｎｔ　ｓｈｅａｒｓｔｒｅｓｓｆｉｅｌｄＰｅｉ－ＳｈａｎＣＨＥＮ；（陈培善）Ｔｏｎｇ－ＸｉａＢＡ...

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简介：枚举的算法被介绍了进ASR模型的恰当的过程。与M6基于21大地震的详细学习。8在中国大陆，在大地震前的地震紧张版本的统计特征被总结了。在团中，紧张版本模型能被划分成五种类型。第一是DA模型，紧张版本在更宽广的区域在加速并且在震中附近在小区域速度。约38%地震样品具有这种类型。第二是AD模型，紧张版本在更宽广的区域在速度并且与占据ratioof在震中附近在更小的区域加速约19%。第三是ASR，仅仅加速的紧张版本能在被观察。这个模型的盒子等于大约14%。第四是数据设置就绪，仅仅速度的紧张版本能在被检查，等于大约24%。仅仅有第五种类型(LSR)的一件地震样品，它显示出一个线性紧张版本。在持续时间有36年差别预先震惊在加速并且速度的模型之间的序列。在大地震一般来说是一个典型特征以前，这对小地震的增加的seismicity的一个背景意味着那地震静止。为DA模型，分别地，为稳定的加速并且速度的紧张版本的批评区域的平均尺寸关于到400km和100km的260km到200km3～5次，1～2预定大小7的地震的破裂尺寸。0。广告模型是DA模型的反面。模型参数，m价值，好稳定性。ASR的比率关于为加速地震紧张版本现象的一样，不管紧张版本模型是什么，或紧张版本数量怎么大。关于速度地震紧张版本现象，DA模型有最特殊的速度紧张版本特征并且是地震紧张版本的典型特征，我。e。“速度在里面加速外面地震紧张模型”。

简介：DearContributors,ReadersandFriends:2011milestonesthetenthanniversaryoftheJournalofEarthquakeEngineeringandEngineeringVibration.wefirstwanttotakethisopportunitytoexpressourgratitudetothoseretiringmembersoftheEditorialBoardfortheirvaluablecontributionsinthepast,andtowelcomethosewhojoinedtheEditorialBoardthisyear.AswementionedinourmessagetoyouinDecember2010,effective20ll,thejournalisofficiallyco-sponsoredbytheHuixianEarthquake

简介：与1°x的分辨率基于活跃外壳的块构造，全新统活断层和波速结构1°，为中国大陆的构造压力紧张域的一个二维的有限元素模型在纸被构造。用GPSmeasurements，然后，为模型的速度边界条件被推出中国大陆的今日的压力紧张地的年变化模式被模仿。结果证明(1)在中国大陆的最近的构造变形的一般模式被它的包围盘子的相互作用管理，哪个，印度板起一个主要作用。在中国大陆的西方有指导NNE的速度分布。最大值滑倒率出现在碰撞边界。指导北方的部件减少，当指导theeast的部件从南方逐渐地增加到北方并且从西方到东方时。在东方部分，有一个一般指导东方的运动，与在中国大陆的今日的构造应力场经历了的指导南方的部件(2)的某个数量最近的年里的改进的过程，并且这个过程介绍作为中心从Qinghai-Xizang(西藏)高原向东放射的一个一般模式。一般模式类似于周围的构造应力场，显示中国大陆上的当代的构造变形的继承。(3)最大的主要紧张介绍在东方在西方和low高的一个明显的模式。在西方的构造运动在东方是比那强壮的。Largeactive差错都位于最大的主要紧张的高值的地区。然而，紧张的大小在活跃的外壳的块的内部是更小的，它被这些差错围住。(4)四川云南区域的压力紧张地是唯一的。它不能被盘子的碰撞独自管理但是外部活跃的块的运动的联合，在下地壳或上地幔和特殊构造几何学的材料流动(例如东方喜玛拉雅的句法)也。